LV Fractional Shortening

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Data Acquisition

LV fractional shortening

Reference Values

Normal FS (%)
M-Mode >25
2-D measurement >18


\[FS = \frac{LVEDD-LVESD}{LVEDD} \times 100%\]


LVEDD Left ventricular end-diastolic dimension
LVESD Left ventricular end-systolic dimension
FS Fractional Shortening


1. Lang RM, et al. Recommendations for chamber quantification. J Am Soc Echocardiogr 2005; 18:1444. Abstract
2. Lewis RP, et al. Relationship between changes in the left ventricular dimension and ejection fraction in man. Circulation 44:548; 1971. Abstract


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Developer & Illustrator: Sirikarn Napan, MD, FACC